Modelling of the atomization of a plain liquid fuel jet in crossflow at gas turbine conditions

Rachner, Michael; Becker, Julian; Hassa, Christoph; Doerr, Thomas

doi:10.1016/s1270-9638(01)01135-x

Cited by 81 publications

(35 citation statements)

References 19 publications

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“…The data used to develop this correlation featured values of q from 5 to 50. Becker and Hassa (2002) and co-workers (Rachner et al, 2002) provided a slightly modified version using data at elevated pressure with q varying from 1 to 40, provided as Eq. (6).…”

Section: Correlation Frameworkmentioning

confidence: 99%

Injection of Water-in-Oil Emulsion Jets Into a Subsonic Crossflow: An Experimental Study

et al. 2014

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Section: Correlation Frameworkmentioning

confidence: 99%

Injection of Water-in-Oil Emulsion Jets Into a Subsonic Crossflow: An Experimental Study

et al. 2014

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“…Figure 4 shows a comparison of a computed volume fraction profile to the corresponding PDA measurement provided by Rachner et al [43]. The line and the circles represent computed and measured results, respectively.…”

Section: Resultsmentioning

confidence: 97%

“…The given baseline case has been studied in several publications in which gas velocities and particle volume fluxes are presented [42][43][44]. Figure 4 shows a comparison of a computed volume fraction profile to the corresponding PDA measurement provided by Rachner et al [43].…”

Section: Resultsmentioning

confidence: 99%

“…The baseline case is a spray jet in crossflow (JICF) which has been investigated using phase-Doppler anemometry (PDA), Mie-scattering, and shadowgraphy [42,43]. Spray was injected into a pressurized channel (5.8bar) with crossflow.…”

Section: Case Descriptionmentioning

confidence: 99%

“…The nozzle diameter is 0.45mm, the channel height is 40mm, the gas velocity U = 100m/s. The momentum flux ratio, defined by equation (19), is J = 18 for the baseline case [42,43].…”

Section: Case Descriptionmentioning

confidence: 99%

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Effects of aerodynamic particle interaction in turbulent non-dilute particle-laden flow

Salewski

Fuchs

2008

Journal of Turbulence

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Aerodynamic four-way coupling models are necessary to handle twophase flows with a dispersed phase in regimes in which the particles are not dilute enough to neglect particle interaction but not dense enough to bring the mixture to equilibrium. We include an aerodynamic particle interaction model within the framework of large-eddy simulation (LES) together with Lagrangian particle tracking (LPT). The particle drag coefficients are corrected depending on relative positions of the particles accounting for the strongest drag correction per particle but disregarding many-particle interactions. The approach is applied to simulate monodisperse, rigid, and spherical particles injected into crossflow as an idealization of a spray jet in crossflow. A domain decomposition technique reduces the computational cost of the aerodynamic particle interaction model. It is shown that the average drag on such particles decreases by more than 40% in the dense particle region in the near-field of the jet due to the introduction of aerodynamic four-way coupling. The jet of monodisperse particles therefore penetrates further into the crossflow in this case. The strength of the counter-rotating vortex pair (CVP) and turbulence levels in the flow then decrease. The impact of the stochastic particle description on the four-way coupling model is shown to be relatively small. If particles are also allowed to break up according to a wave breakup model, the particles become polydisperse. An ad hoc model for handling polydisperse particles under such conditions is suggested. In this idealized atomizing mixture, the effect of aerodynamic four-way coupling reverses: The aerodynamic particle interaction results in a stronger CVP and enhances turbulence levels.

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Crude oil jets in crossflow: Effects of dispersant concentration on plume behavior

et al. 2016

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This study investigates the effects of premixing oil with chemical dispersant at varying concentrations on the flow structure and droplet dynamics within a crude oil jet transitioning into a plume in a crossflow. It is motivated by the need to determine the fate of subsurface oil after a well blowout. The laboratory experiments consist of flow visualizations, in situ measurements of the time evolution of droplet-size distributions using holography, and particle image velocimetry to characterize dominant flow features. Increasing the dispersant concentration dramatically decreases the droplet sizes and increases their number, and accordingly, reduces the rise rates of droplets and the upper boundary of the plume. The flow within the plume consists primarily of a pair of counterrotating quasi-streamwise vortices (CVP) that characterize jets in crossflows. It also involves generation of vertical wake vortices that entrain small droplets under the plume. The evolution of plume boundaries is dominated by interactions of droplets with the CVP. The combined effects of vortex-induced velocity and significant quiescent rise velocity of large ($5 mm) droplets closely agree with the rise rate of the upper boundary of the crude oil plume. Conversely, the much lower rise velocity of the smaller droplets in oil-dispersant mixtures results in plume boundaries rising at rates that are very similar to those of the CVP center. The size of droplets trapped by the CVP is predicted correctly using a trapping function, which is based on a balance of forces on a droplet located within a horizontal eddy.

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Modelling of the atomization of a plain liquid fuel jet in crossflow at gas turbine conditions

Cited by 81 publications

References 19 publications

Injection of Water-in-Oil Emulsion Jets Into a Subsonic Crossflow: An Experimental Study

Injection of Water-in-Oil Emulsion Jets Into a Subsonic Crossflow: An Experimental Study

Effects of aerodynamic particle interaction in turbulent non-dilute particle-laden flow

Crude oil jets in crossflow: Effects of dispersant concentration on plume behavior

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